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1、,机电技术专业英语,2,Lesson Four,Text,There are a number of methods of joining metal articles together, depending on the type of metal and the strength of the joint which is required. Soldering gives a satisfactory joint for light articles of steel, copper or brass, but the strength of a soldered joint is ra
2、ther less than that of a joint which is brazed, riveted or welded1. These methods of jointing metal are normally adopted for strong permanent joints.,Welding,Lesson Four,New Words and Expressions,Lesson Four,Lesson Four,Notes,1. Soldering gives a satisfactory joint for light articles of steel, coppe
3、r or brass, but the strength of a soldered joint is rather less than that of a joint which is brazed, riveted or welded. 锡焊焊接薄钢件、薄铜件或薄黄铜件，焊接效果很好，但其强度比铜焊、铆焊或焊接要低得多。 light articles 薄件； a joint 一条焊缝；“which” 引导定语从句修饰“a point”。 2. At this temperature the metal becomes plastic. The ends are then pressed o
4、r hammered together, and the joint is smoothed off. 在这种高温下，金属变成塑性体。然后，再把接头强压在一起或锤压在一起，最后把焊缝磨光。 ends表示金属两头；the joint is smoothed off, 焊缝被磨光 3. A number of different types of weld may be used, but a vshaped weld should be normally employed. 焊接的形式可以多种多样，但通常应采用V形焊缝。,Lesson Four,Lesson Four,参考译文,把金属件连接在一起的方法很多，因金属的类型和所需接缝的强度不同而异。锡焊焊接薄钢件、薄铜件或薄黄铜件，焊接效果很好，但其强度比铜焊、铆焊或焊接要低得多。这些连接金属的方法通常用于高强度的永久性接合。,焊 接,谢谢观赏,,Thank You !,
